Superpower — Extensible Agent Capabilities Plugin

Superpower is an OpenCode plugin that dynamically loads agents, skills, and commands from the superpowers repository. It extends OpenCode with custom agents and capabilities without requiring code changes.

Architecture

Startup → Clone superpowers repo → Load agents → Register skills → Register commands → Ready

• Dynamic Agent Loading: Loads agent definitions from ~/.superpowers/agents/
• Skill Registry: Registers skills from ~/.superpowers/skills/
• Command Templates: Registers command templates from ~/.superpowers/commands/

How It Works

On first load, Superpower clones the superpowers repository to ~/.superpowers/. It then:

1. Scans ~/.superpowers/agents/*.md and registers agents with OpenCode
2. Scans ~/.superpowers/skills/*/SKILL.md and registers them as skills
3. Scans ~/.superpowers/commands/*.md and registers them as commands

The superpowers repo is cloned once and reused on subsequent runs.

Quick Start

1. Register Plugin

In .opencode/opencode.json:

{
  "$schema": "https://opencode.ai/config.json",
  "plugin": [
    "./plugins/superpower/index.ts"
  ]
}

2. Use

Use any agent defined in the superpowers repository:

@<agent-name> Your task description here

For example, if the superpowers repo contains a reviewer agent:

@reviewer Review the authentication module

3. Use Skills

Skills are registered with the superpowers/ prefix:

@superpowers/reviewer Review the authentication module

4. Use Commands

Commands are available directly:

/<command-name> argument1 argument2

Agent Format

Agents are defined in Markdown files with YAML frontmatter in ~/.superpowers/agents/:

---
name: reviewer
description: Code reviewer agent that provides constructive feedback
mode: subagent
---

You are an experienced code reviewer. Your role is to:
1. Understand the code changes
2. Identify potential issues
3. Provide constructive feedback
4. Suggest improvements

Frontmatter Fields

| Field | Type | Required | Description | |-------|------|----------|-------------| | name | string | No | Agent name (defaults to filename without .md) | | description | string | No | Agent description shown in OpenCode | | mode | string | No | Agent mode: subagent, primary, or all (default: subagent) |

Skill Format

Skills are directories in ~/.superpowers/skills/ containing a SKILL.md file:

~/.superpowers/skills/
└── reviewer/
    └── SKILL.md

SKILL.md uses YAML frontmatter:

---
description: Review code changes and provide feedback
---

# Code Review Skill

You are an expert code reviewer. When invoked:
1. Read the diff or changed files
2. Analyze for bugs, security issues, performance problems
3. Check for code style consistency
4. Provide actionable feedback

Command Format

Commands are Markdown files in ~/.superpowers/commands/:

---
name: review
description: Review code changes
---

Review the following code changes:
$ARGUMENTS

The $ARGUMENTS placeholder is replaced with user input.

Configuration

No configuration required! Superpower automatically clones and loads from ~/.superpowers/.

Manual Override

If you want to use a different superpowers location, you can set the environment variable:

export SUPERPOWERS_DIR=/path/to/your/superpowers

Directory Structure

.opencode/
├── opencode.json              # Plugin registration
└── plugins/
    └── superpower/
        └── index.ts           # Plugin entry point

Troubleshooting

Superpowers not being loaded

1. Check that ~/.superpowers/ exists
2. Verify the directory contains agents/, skills/, and commands/ subdirectories
3. Check that Markdown files have proper frontmatter

Agents not appearing

1. Verify agent files are in ~/.superpowers/agents/*.md
2. Check that frontmatter has valid mode field
3. Ensure the Markdown body is not empty

Skills/Commands not working

1. Verify skill directories contain SKILL.md
2. Check command files have proper frontmatter
3. Ensure $ARGUMENTS placeholder is used for commands that need user input

See Also

• superpowers Repository
• OpenCode Documentation